* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
html,
body,
#app {
  height: 100%;
}
ul,
li {
  list-style: none;
}
a {
  text-decoration: none;
}
input {
  outline: none;
}
.clear::after,
.clear::before {
  content: '';
  display: block;
  clear: both;
}
